//  提取JSON 数据
let jsonData = {
    id: 42,
    status: "OK",
    data: [867, 5309]
  };
  
  let { id, status, data: number } = jsonData;
  
  console.log(id, status, number);
  // 42, "OK", [867, 5309]
  jQuery.ajax = function (url, {
    async = true,
    beforeSend = function () {},
    cache = true,
    complete = function () {},
    crossDomain = false,
    global = true,
    // ... more config
  } = {}) {
    // ... do stuff
  };